Often times a kitchen sink and garbage disposal are ignored in the household cleaning process. I mean, what the heck? Hot water and soap run through them both on a regular basis, so why do they need cleaned? Unfortunately, bits of food get stuck in the rubber part of the drain, then in the disposal and grow bacteria. Then a stench starts to develop. Yuck-o!
You should never, ever, ever,ever (!) put a chemical down this drain. It's not only not healthy, but it's not safe as the chemical could splash back up on you when you run the water or start the disposal. So how does one clean the sink and garbage disposal? Simply and naturally, of course!
I sprinkled the lemon with a tablespoon or so of sea salt and just used it to scrub out the sink. It easily scrubs off any stains or caked on guk (technical term) that is in the sink. Afterwards I just rinsed with hot water and had a sparkly clean sink!
To clean the garbage disposal, cut the lemon you used to scrub with into smaller chunks. Push the chunks down into the disposal and toss in a half cup of baking soda and a handful of ice. Let the ice melt a little and then run the garbage disposal with cold water running until the lemon and ice are completely ground up and gone. The ice and lemon rind helps to clean and sharpen the blades, while the baking soda cleans the actual housing of any grossness that is lingering there. Not to mention the sink smells lemony fresh afterwards!